cleanup ignored static analysis (#16767)

cmd/signature-v4-parser_test.go

@@ -630,9 +630,8 @@ func TestDoesV4PresignParamsExist(t *testing.T) {
 // TestParsePreSignV4 - Validates the parsing logic of Presignied v4 request from its url query values.
 func TestParsePreSignV4(t *testing.T) {
 	// converts the duration in seconds into string format.
-	getDurationStr := func(expires int) string {
-		return strconv.Itoa(expires)
-	}
+	getDurationStr := strconv.Itoa
+
 	// used in expected preSignValues, preSignValues.Date is of type time.Time .
 	queryTime := UTCNow()